计算最大Lyapunov指数的推广小数据量法

在分析常用的计算最大Lyapunov指数小数据量法的基础上,研究了混沌吸引子时间轨道的不可逆特性,提出基于后向搜索和双向搜索计算最大Lyapunov指数的推广小数据量法通用经验公式。数值仿真表明,新方法比原来仅做前向搜索的小数据量法在计算准确度和抗噪声性能上更加优越。     

Quality Provision with Heterogeneous Consumer Reservation Utilities

This study examines a firm's quality and price decisions when consumers differ not only in their willingness‐to‐pay for quality but also in their reservation utility for the basic product. We find that while the firm offers lower‐quality products when consumers' valuations for quality deteriorate, the optimal quality may increase with a negative shift in consumers' reservation utilities. We also investigate the optimal price and quality of the products within a vertically differentiated product line when the number of products is exogenously given. The existing literature shows that when consumers differ only in their willingness‐to‐pay for quality, the firm sets the efficient quality for consumers with the highest valuation for quality, whereas the concern for cannibalization pushes down the quality of inferior products. We find that when consumers are heterogeneous in both their reservation utility and valuation for quality, the concern for cannibalization may distort the quality upwards, even for consumers with the highest willingness‐to‐pay for quality. In addition, a low‐quality product may enjoy a higher profit margin than a high‐quality product within the product line.     

Competition and Coordination in Two‐Tier Public Service Systems under Government Fiscal Policy

As a result of government budgetary limits and rapid market growth, many public service systems—such as health care—are characterized by extensive customer wait times that have become a serious problem. This problem might be solved by allowing private firms to enter these markets, which would provide customers with a choice between a free (governmental) public service provider (SP) and a fee‐charging (or “toll”) private SP. In such a two‐tier service system, the two SPs are differentiated by service quality and cost efficiency. This study focuses on the competition and coordination issues for two‐tier service systems with customers who are sensitive to both service quality and delay. The free system attempts to maximize its expected total customer utility with limited capacity, whereas the toll system attempts to maximize its profit. Neither goal is aligned with the social welfare goal of the public service. To achieve the social welfare goal, the government plays a crucial role in coordinating the two‐tier service system via the budget, the tradeoff of social members' goals, and tax‐subsidy policies. Using a mixed duopoly game, we establish Nash equilibrium strategies and identify the conditions for the existence of the two‐tier service system. We employ several interesting and counter‐intuitive managerial insights generated by the model to show that the public service can be delivered more efficiently via customer choice and SP competition. In addition, we show that a relatively low tax‐subsidy rate can almost perfectly coordinate the two SPs to achieve most of the maximum possible benefit of the two‐tier service system.     

论预售商品房权属之博弈

商品房预售在我国的房地产市场中已经成为主要的销售形式,而商品房预售的特殊性质决定了预售商品房上的权利主体较多,各权利主体均对预售商品房主张权利并由此产生争议。本文从司法实践中预售商品房上权利主体之争出发,探析预售商品房权属发生争议的原因,厘清预售商品房从开发公司建造房屋到预购人完成不动产物权登记期间,不同时间段预售商品房上权利主体及其所享有的权利性质,使各权利人明确自身权益并进行有效的权利救济。     

上市公司最优动态股利支付模型的构建

通过对福建省上市公司历年股利政策的分析,在考虑公司管理层和中小投资者双方利益的基础上,利用博弈论和动态规划的思想构建了上市公司动态股利支付模型,为上市公司股利支付政策的制定提供了参考依据。     

近百年来日本中国史研究著作中辽金史相关内容提要——《20世纪以来日本中国史学著作编年》读后感

胡宝华先生的《20世纪以来日本中国史学著作编年》一书,2012年由中华书局正式出版。该书共收录了近百年来日本学界关于中国古代史研究的相关学术著作1200余部。作者在书中以“章目提要”的方式介绍了20世纪以来日本中国史研究的成果,为我们客观掌握原著的基本信息提供了可能。同时作者在编写此书时,审慎参考了大量相关书评,为入选...     

从“纯爱”到“穿越”--网络言情小说模式的演变

随着港台言情小说的盛行以及市民社会的兴起,被新文学压抑近半个世纪的言情小说在上世纪末闪亮登场,并在网络时代重新繁荣。在中国言情小说史上,琼瑶模式曾引领了言情市场很多年。网络言情小说似乎也延续着琼瑶模式,经历了一个从“纯爱”到“穿越”、从灰姑娘到玛丽苏的阶段,随后又出现了反琼瑶、反纯情等多元化现象。网络时代实现了言情小说模式的转型。     

中国城市群基本概念的再认知

城市群并不是孤立封闭的体系,它是与邻近区域内、特别是经济发达的城镇密集区的特定区域范围内不同规模的城市(镇)有着密切联系,依托优越的自然环境基础和发达的交通运输体系以及信息网络形成的一个比较完整的有机整体。尤其是在全球经济一体化以及新型城镇化的新形势下,城市群区内每一个城市均发挥着区域经济增长点和城市功能的特殊作用,并依托城乡一体化区域发挥着强大的辐射作用(包括集聚与疏散作用)。本文在这一基础上深入分析了中国城市群是由城镇化高度发育而形成这一动力问题;论证城市群与城镇密集区的相似性,并对我国城市群范围的识别标准和城市群基本概念的再认识,比较完整地概括了当前我国城市群研究动态与阶段性成果,以供我国城市地理与经济学工作者参考,以便更加深入地研究中国城市群的特有现象和各类问题。     

以申办奥运会推动上海可持续发展

中国2010年上海世博会后,上海的转型发展需要找到一个新的有力抓手,申办奥运会显然是一个重要选项。如能成功申办和主办奥运会,上海的城市发展和国际化大都市建设都将再上一个新台阶。上海申办奥运会具有极大的优势,不仅基础设施已相当健全,而且还有其他国家无法复制的举国体制这一有利条件。